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L. H. TIMMANS DBRRIGK.. No. 565,708. Patented Aug.11, 1896.

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L. H. TIMMANS.

DBRRIGK,

No. 565,708. Patented Aug. 11, 1896A.

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UNITED STATES PATENT EErcE.;

LOUIS H. TIMMANS, OF BALTIMORE, MARYLAND, ASSIGNOR TO LOUISB. BERNEI ANDMAURICE LAUPHEIMER, OF SAME PLACE.

DERRICK.

SPECIFICATION forming part of Letters Patent No. 565,708, dated August11,1896.

Application tied April so, 1895.

To all whom it may concern.:

Beit known that I, LoUIs H. TIMMANs, a citizen of the United States,residing at the city of Baltimore, State of Maryland, have inventedcertain new and useful Improvements in Derricks; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My present invention relates to derricks especially adapted to raisevery heavy weights and designed with reference for use as afloatingderrick to raise wrecked vessels and for handling heavy machinery andother bodies in a harbor, but may be used on a stationary base orfoundation; and it consists in certain novel features of construction,which will be fully disclosed in the following speciiication and claims.

In the accompanying drawings, which forni part of this speciiication,Figure l represents a side elevation of my invention; Fig. 2, a verticaltransverse section of the scow on line 2 2, Fig. l, and showing one ofthe A-frames in end elevation; Fig. 3, a side view of one of thebrace-blocks detached; Fig; 4:, an edge view of the same; Fig. 5, a sideof the lower end of one of the masts of the A-frame; Fig. 6, atransverse section of said mast on the line 6 6, Fig. 2, on an enlargedscale; Fig. 7, a like view on line 7 7, same iigure; Fig. S, a verticalsection of the upper ends of the two A-frames; Fig. 9, a transversesection on line 9 9, Fig. S; and Fig. 10, a side view of the lower endof the boom and its bearing.

Reference being had to the drawings and the letters thereon, A indicatesa scow upon which the derrick is supported when used for marinepurposes, such as raising wrecked and sunken vessels or for handlingheavy bodies in a harbor; B B, the A-frames, which are composed of themasts d d, which are supported upon a suitable base or frame in thescow, and may be secured by knees or brackets h b. (Shown in Fig. 5.)Between the upper end of the masts is interposed a brace-block c, whichis provided with a vertical slot :n to receive the draft-rod, verticalsides d d, and inclined sides ee below the vertical portions d CZ, andthe angle of said Serial No. 547,623. (No model.)

inclined portions corresponds with the angle of the Afframe,transversely of the frame, as shown in Fig. 2. The extreme upper ends ofthe masts being cut at ff correspond with the vertical sides d d of thebrace-block, and the masts and the brace-block are secured together bytransverse bolts g. The flat vertical portions CZ d on the brace-blockand the corresponding parts f f on the masts form shoulders orbearing-surfaces, which, in conjunction with the inclined portions e con the brace-block and the sides of the inasts, resist lateral strain onthe A-frame and prevent the masts sliding upon the brace-block, as theydo when an inclined block only is used. On the front and rear sides ofthe A- frame are metal plates 7L h, through which the masts and thebraceblock pass, the eyebolts t, to which the guy-lines 7c are attached,and the draft-rods Z and the yoke m.

`The draft-rod l is provided with an eye n, at each end and is securedto each A-frame by a shoulder or a nut o and lock-nut p, and thetackle-blocks q o engage the eye in the the draft-rod, and the yoke atopposite ends of the draft-rod and the strain of the draft or weight ofthe body being raised is distributed upon the draft-rod and the yoke,and at the' same time the strain is upon both Aframes, they beingsecured together by the draft-rod and by the crossed braces .s s, asshown in Fig. l.

C O indicate the booms or jibs, which may be of the same form ofconstruction .as the masts ct a, and one of said booms is provided ateach end of the derrick and is supported upon a suitable pivot-bearing tby the head u, which is provided with trunnions o, which are engaged bystraps |`at, secured to the lower end of the boom, as shown in Fig. 10,and the boom vibrates upon the trunnions Q: and rotates on thepivot-bearing t, so that the boom may be swung to operate on either sideof the scow or at any point forward of its support upon the deck of thescow. The booms are connected at their upper ends to the Aframes B B byhoisting-ropes d b', which engage the tackle-blocks q r, respectively,and the blocks c d, attached to the booms7 and the ropes a' b then passover blocks e f and extend to blocks c" f and from thence tosuitablehoist- IOO ing machinery (not shown) located in the cabin D ofthe scow.

On the outside of the booms C C and to the upper ends thereof areattached the hoistingtackle E, comprising blocks g h and ropes i', whichalso pass over blocks 7c and extend to the hoisting machinery.

On each side of the booms (though only one is shown) is attached a blockl and rope m to draw the booms into position for work. By thisarrangement of the hoisting-tackle the tackle E which is not in use maybe secured to the deck of the scow, as shown at n', and the weight ofthe body being raised is distributed throughout the compound derrick. Ina stationary derrick the tackle E not in use may be secured to somestationary object on which to draw, or in either event the two booms maybe used for hoisting at the same time when the weights on the two boomswill resist each other. The frames may be further secured to resist thestrain of the body being raised by brace-lines o', which are providedwith the usual turnbuckles p for regulating the tension on said lines,and the guy-lines /c are provided with turnbuckles q for the samepurpose.

The masts and the booms are hollow metallic structures composed ot acentral longitudinal web or plate 7, to which are bolted on oppositesides webs or plates s s of T-iron, which extend through out the entirelength of the masts and the booms, and between said plates aretransversely-curved plates of metal t t 1f t and secured thereto bybolts or rivets u', which extend through the flanges o o on the plates tand through the plates r s', as shown in Figs. G and 7. The masts andthe booms are given a swell in their longitudinal center, as at fw', andtaper gradually toward each end, and the plates r s project beyond theplates t a greater distance in the center of the masts and the boomsthan at the ends, the object of which is to supply the greatest strengthto that part of the structure subj ected to the greatest strain inhoisting heavy bodies. The masts and the booms thus constructed possessgreat strength while they are comparatively light in weight and theprojecting webs or plates r s' afford a ready means for securingbrace-rods, as shown aty in Fig. 7.

The blocks 7c and e f may be supported by a cross-bar z. (Shown in Fig.2.)

The draft-rod l is applied by inserting it in the vertical slot fr: inthe upper end of the brace-block c, which slot is also formed in theplates h, and that part of the slot above the draft-rod is lled afterthe rod has been inserted.

Having thus fully described my invention, what I claim isl. Aderrick-frame composed of two hollow metallic masts having their upperends and adjacent sides cut at an angle to the sides of the masts and abrace-block having vertical and angular sides to correspond with theupper ends and the adjacent surfaces of the masts.

2. A derrick-frame composed of a pair of A-frames connected at theirupper ends by a draft-rod extending through both frames in combinationwith a boom connected to each end of the draft-rod and suitablehoistinglines.

3. A derrick-frame composed of two masts having their upper and adjacentends cut at an angle to the sides of the masts, an interposedbrace-block having vertical and angular sides to engage said upper endsof the masts, plates on the front and rear sides of the masts, andeyebolts extending through the masts and the plates, in combination witha boom guy-lines attached to said eyebolts and a suitable hoisting-line.

4. A derrick-frame composed of a pair of A-frames connected at theirupper ends by a draft-rod extending through both frames and havi'ng aneye at each end and a yoke on the front and rear of the frame andextending over the eye of the draft-rod in combination with a boomconnected to each end ot' the draft-rod and to one of said yokes andsuitable hoisting-lines.

5. A derrick-frame composed of a pair of A-frames connected at theirupper ends by`a draft-rod extending through both frames, and a pluralityof eyebolts extending through the frames with the eyes of the bolts onthe adjacent sides of the A-frames, in combination with crossedguy-lines engaging said eyebolts, a boom connected to each end of thedraft-rod and suitable hoisting-lines.

6. A hollow metallic mast for a derrickframe composed of a continuouscentral web and webs connected to each side thereof and all the webstapering from the longitudinal center of the mast toward both ends andtransversely-curved plates secured to the webs and tapering from thelongitudinal center to the ends of the masts.

7. A hollow metallic mast having a swell IOO IIO

in the center, and provided with projecting webs extending throughoutthe length ot the mast, the greatest projection of the webs beyond thebody of the mastbeing in the longitudinal center of the masts.

8. A compound dei-rick composed ot two A-frames connected by acontinuous draftrod extending through both frames and each frameprovided with a boom connected to said draft-rod, in combination with aline for connecting the Working boom to the idle boom and a line forconnecting the idle boom to a resisting medium.

In testimony whereof I affix my signature in presence of two witnesses.

LOUIS H. TIMMANS. Witnesses D. C. REINOHL, D. WEIMER RniNoHL.

